Plumb-level.



J. HOLM.

PLUMB LEVEL. APPLICATION man FEB. 23. I917.

Patented Sept. 25, 1917.

. sonn- HOLM; on

TERRITORY OF ALASKA.

PLUMB-LEVEL.

Specification of Letters Patent.

Patented Sept. 25, 1917.

Application area February 23, 191,7 Serial a 159,411.

To all whom it may concern Be it known that I, .IoHN HQLM, b citizen ofthe United States, residing at J uneau, in the Territory of Alaska, haveinvented certain new and useful Improvements in Plumb-Levels, of whichthe following is a specification.

My invention relates to plumb levels, and has for its object to providea level of simple and cheap construction which is adapted to be used inconnection with a straight edge stock for determining in degrees therise or fall of an uneven surface.

Other and further objects will be in part apparent and in part describedas the description is proceeded with.

In the accompanying drawings forming part of this specification:

Figure 1 is a top plan view of my invention, showing the cover plateremoved;

Fig. 2 is a similar view with the cover plate in place;

Fig. 3 is a rear perspective view of the front cover or plate detached;

Fig. 4 is a plan View of the rear cover or plate detached;

Fig. 5 is a sectional view on the line 5-5, Fig. 1 and Fig. 6 is adetail view of the pendulum or pointer.

Referring more specifically to the accompanying drawings in which like'reference numerals indicate corresponding parts throughout the severalviews, 1 denotes a stock or straight edge apertured as at 2 for thereception of a metallic ring-like casing or body member 3. The casing 3while preferably annular in form obviously may be of any desired shapeadapted to fit any correspondingly shaped opening 2. Thumb nuts 24 serveto maintain the casing fixedly within the opening 2 in a predeterminedposition as will hereinafter appear.

A readily removable cross plate or bar 4 has its ends snugly butslidably fitting within oppositely disposed grooves 5 formed in theinner peripheral wall of the casing 3. The grooves 5 are so alined andpositioned with respect to the straight edge or stock that the bar 4will parallel the bottom or straight edge 6 of the stock or straightedge 1.

An inverted U-shaped member 7 is rigidly bolted, in depending position,to the bar 4 as by means of bolts 8 and nuts 9. A T- shaped pendulum orpointer 10 is pivotally mounted between the apertured ears 11 of thisbar,pointed screws 12 adapted to enter the recesses 13 formed in, thehead lt of the pointerv serving as bearings about which the pointeroscillates. The pointer is of such a length that the point of the samewill work over and in close proximity to the graduated dial 15.

In order to protect the parts of the plumb from the elements and alsopresent an attractive appearance front and rear covering plates 16 and17 are provided. These plates are in the form of fiat disks adapted tofit snugly within the aperture 2 and against the front and rear sideedges respectively of the ring-like member or casing 3. The plate 16 isheld in place by means of angle strips 17 secured to plate 16 in pairsas by rivets or the like 18, the strips of each pair being spaced apartsufliciently to accommodate .therebetween the cross plate or bar 4.

Angle strips 19 secured to the rear cover plate 17 by rivets or the like20 are adapted to clamp the plate 17 to the rear edge of the bar 4. Itwill thus be observed that the cover plates may be readily removed topermit access to the various parts for purposes of repair.

The front cover plate 16 is cut away or depleted circumferentially as at21 to expose the dial and lower end of the pointer to vilew without thenecessity of removing the p ate.

As many changes could be made in the above construction and manyapparently widely different embodiments of my invention, within thescope of the claims constructed without departing from the spirit orscope thereof, it is intended that all matter contained in theaccompanying specification and drawings shall be interpreted asillustrative and not in a limiting sense.

Having thus described my invention, what I claim is:

1. The combination with a stock provided with a recess, of a plumb levelcomprising a casing formed of a ring-like metallic mem ber adapted to beseated in said recess, said ring-like member being provided with agraduated dial and formed with a pair of oppositely disposed grooves, across bar slidably mounted in said grooves, and a pointer mounted onsaid cross bar.

2. The combination with a recessed member, of a plumb level comprising acasing adapted to be seated in said recessed member, a removable crossbar within said casing, a pointer supported on said cross bar,

10 a graduated dial Within said casing, and

front and rear covers for said casing supported from said cross bar,said front plate being depleted circumferentially to expose said dialand pointer to View.

In testimony whereof I affix my signature. 15

. JOHN HOLM.

Witnesses: l I

DAVE HOUSEL, R. H. STEVENS.

Copies of this patent may be obtainedfor five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

